LM393ADE4 Equivalent & Substitute Parts

Part Overview

The LM393ADE4 is a general-purpose dual comparator IC manufactured by Texas Instruments in 8-SOIC surface-mount packaging. This device features open-collector, rail-to-rail output configuration with a supply voltage range of 2V to 36V (single) or ±1V to ±18V (dual). The LM393ADE4 is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity.

Key Parameters

Parameter	Value
Manufacturer Part Number	LM393ADE4
Manufacturer	Texas Instruments
Category	Linear
Type	General Purpose Comparator
Number of Elements	2
Output Type	Open-Collector, Rail-to-Rail
Voltage - Supply, Single/Dual (±)	2V ~ 36V, ±1V ~ 18V
Voltage - Input Offset (Max)	2mV @ 30V
Current - Input Bias (Max)	0.25µA @ 5V
Current - Output (Typ)	20mA
Current - Quiescent (Max)	2.5mA
Operating Temperature	0°C ~ 70°C
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the LM393ADE4 are selected based on strict electrical and mechanical compatibility criteria. The following parameters determine valid substitution:

Critical Matching Parameters:

Number of Elements: 2 (dual comparator configuration)
Output Type: Open-Collector, Rail-to-Rail
Voltage - Supply, Single/Dual (±): 2V ~ 36V, ±1V ~ 18V
Package / Case: 8-SOIC (0.154", 3.90mm Width)
Mounting Type: Surface Mount

Acceptable Variation Parameters:

Voltage - Input Offset (Max): Up to 7mV @ 30V
Current - Input Bias (Max): Up to 0.4µA @ 5V
Current - Output (Typ): 16mA to 20mA
Current - Quiescent (Max): 1mA to 2.5mA
Operating Temperature: 0°C ~ 70°C or extended ranges (-40°C ~ 125°C)

Substitute parts are categorized as MFR Recommended (direct replacements with equivalent specifications) or Upgrade (enhanced performance or extended operating conditions).

Parameter Comparison

Part Number	Manufacturer	Product Status	Voltage - Supply (V)	Input Offset Max (mV)	Input Bias Max (µA)	Output Current Typ (mA)	Quiescent Current Max (mA)	Operating Temp (°C)	Package
LM393ADE4	Texas Instruments	Obsolete	2-36 / ±1-18	2 @ 30V	0.25 @ 5V	20	2.5	0 ~ 70	8-SOIC
LM393AD	STMicroelectronics	Obsolete	2-36 / ±1-18	2 @ 30V	0.1 @ 5V	18 @ 5V	2.5	0 ~ 70	8-SOIC
LM393ADR	UMW	Active	2-36 / ±1-18	5	0.25	16	1	0 ~ 70	8-SOIC
LM393M/NOPB	Texas Instruments	Active	2-36 / ±1-18	5 @ 30V	0.25 @ 5V	16 @ 5V	2.5	0 ~ 70	8-SOIC
LM393MX/NOPB	Texas Instruments	Active	2-36 / ±1-18	5 @ 30V	0.25 @ 5V	16 @ 5V	2.5	0 ~ 70	8-SOIC
LM2903WDT	STMicroelectronics	Active	2-36 / ±1-18	7 @ 30V	0.25 @ 5V	20	2.5	-40 ~ 125	8-SOIC
LM2903WYDT	STMicroelectronics	Active	2-36 / ±1-18	7 @ 30V	0.25 @ 5V	20	2.5	-40 ~ 125	8-SOIC
AS393AMTR-E1	Diodes Incorporated	Active	2-36 / ±1-18	3 @ 5V	0.25 @ 5V	16 @ 5V	1	-40 ~ 85	8-SOIC
AS393AMTR-G1	Diodes Incorporated	Active	2-36 / ±1-18	3 @ 1.4V	0.4 @ 5V	16	1	-40 ~ 85	8-SOIC
AS393MTR-E1	Diodes Incorporated	Active	2-36 / ±1-18	5 @ 5V	0.25 @ 5V	16 @ 5V	1	-40 ~ 85	8-SOIC
AS393MTR-G1	Diodes Incorporated	Active	2-36 / ±1-18	5 @ 5V	0.25 @ 5V	16 @ 5V	1	-40 ~ 85	8-SOIC

Engineering Selection Recommendations

MFR Recommended Direct Replacements (Obsolete Status): LM393AD (STMicroelectronics) and LM393ADR (UMW) provide direct functional equivalence to the LM393ADE4 with identical supply voltage ranges and package configuration. Both maintain ROHS3 compliance and MSL-1 rating. LM393ADR is currently active in production with higher inventory availability.

Active Production Alternatives (Texas Instruments): LM393M/NOPB and LM393MX/NOPB are active-status Texas Instruments parts maintaining the LM393 base product number. Both offer identical electrical specifications to the original LM393ADE4 with the exception of input offset voltage (5mV vs. 2mV) and propagation delay specification (700ns). These parts are suitable for new designs and ongoing production.

Extended Temperature Range Upgrades: LM2903WDT and LM2903WYDT (STMicroelectronics) extend the operating temperature range to -40°C ~ 125°C while maintaining all critical electrical parameters. LM2903WYDT includes AEC-Q100 automotive qualification. These parts are appropriate for applications requiring enhanced thermal performance.

Alternative Manufacturer Options: AS393AMTR-E1, AS393AMTR-G1, AS393MTR-E1, and AS393MTR-G1 (Diodes Incorporated) provide active-status alternatives with identical supply voltage and package specifications. These parts feature lower quiescent current (1mA vs. 2.5mA) and extended operating temperature range (-40°C ~ 85°C). AS393MTR-E1 and AS393MTR-G1 offer the highest inventory availability.

Frequently Asked Questions (FAQ)

Q: Can I use LM393M/NOPB as a direct replacement for LM393ADE4? A: Yes. LM393M/NOPB is a direct functional replacement with identical supply voltage range, package configuration, and output type. The input offset voltage specification differs (5mV vs. 2mV), which is acceptable for most general-purpose comparator applications. Both parts are ROHS3 compliant with MSL-1 rating.

Q: What is the difference between LM393ADR and AS393MTR-E1? A: Both parts share identical supply voltage range (2V ~ 36V / ±1V ~ 18V) and 8-SOIC package. LM393ADR is manufactured by UMW with 0°C ~ 70°C operating temperature. AS393MTR-E1 is manufactured by Diodes Incorporated with extended -40°C ~ 85°C operating temperature and lower quiescent current (1mA vs. 1mA). AS393MTR-E1 has significantly higher inventory availability (354,160 pcs vs. 105,100 pcs).

Q: Should I use LM2903WYDT for automotive applications? A: LM2903WYDT includes AEC-Q100 qualification and extended operating temperature range (-40°C ~ 125°C), making it suitable for automotive-grade designs. It maintains all critical electrical parameters of the LM393ADE4 with identical supply voltage and package specifications.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts maintain ROHS3 compliance status, consistent with the original LM393ADE4.

Q: What is the significance of MSL rating differences? A: The LM393ADE4 carries MSL-1 (Unlimited) rating. Most substitute parts maintain MSL-1 or MSL-3 (168 Hours) rating. MSL-3 parts require controlled moisture exposure during storage and handling but are suitable for standard manufacturing processes.

Q: Can I interchange LM393AD and LM393ADR? A: Both parts are functionally equivalent with identical electrical specifications and 8-SOIC packaging. LM393ADR is currently active in production with higher inventory. LM393AD is obsolete. For new designs, LM393ADR is the preferred choice.

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